Wet dust collector for treating flue gas in thermal chemical modification of rice husks
By adopting a uniform cylinder and rotatable water tank structure in the wet dust collector, the problems of poor intake uniformity and incomplete spraying in the thermal chemical modified flue gas treatment of rice husk are solved, and efficient purification of flue gas is achieved, achieving environmentally friendly emissions.
Patent Information
- Application Number
- CN202422503173.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-16
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-10-16
AI Technical Summary
When handling the hot chemically modified flue gas of rice husks, existing wet dust collectors have problems such as poor intake uniformity and incomplete spraying treatment, resulting in the release of sulfur-containing waste gas and polluting the environment.
A wet dust collector including a uniform cylinder, a discharge cylinder and a rotatable water tank is designed to disperse the flue gas evenly through the ventilation holes on the uniform cylinder, and a rotatable water tank is used to form an annular water curtain to react with the flue gas, so as to achieve sufficient removal of harmful impurities.
The uniform intake and sufficient spray treatment of flue gas is achieved, ensuring that the exhausted flue gas meets environmental standards and reducing the release of harmful substances.
Smart Images
Figure CN223233538U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of crop processing, in particular to a wet dust collector for treating flue gas in the thermochemical modification of rice husks. Background Art
[0002] Rice husk is a by-product of rice processing and an important agricultural and forestry biomass resource. Therefore, vigorously developing rice husk biomass resource utilization technology in my country is of great significance to improving environmental pollution and reducing carbon emissions.
[0003] Rice husks undergo thermochemical modification during the fertilizer production process. The flue gas from the smoldering rice husks primarily contains gaseous tar, dust, and soot. During subsequent processing, if bag filters are used, the tar problem quickly renders the bags ineffective. Therefore, wet dust removal is necessary. Traditional wet dust removal towers use a bottom-intake flue gas system and a top-mounted spray system. However, this presents several challenges. Due to the high volume of flue gas from the smoldering rice husks, existing wet dust removal towers, even with high air volume, suffer from poor air intake uniformity and incomplete spraying, resulting in the release of sulfur-containing waste gas into the atmosphere and causing pollution. Utility Model Content
[0004] (1) Technical issues to be resolved
[0005] The utility model provides a wet dust collector for treating flue gas in the thermochemical modification of rice husks. In the process of treating flue gas after smoldering of rice husks, the utility model aims to solve the problems of poor air intake uniformity and incomplete spraying treatment of the dust collector.
[0006] (2) Technical solution
[0007] In order to achieve the above-mentioned purpose, the main technical solutions adopted by this utility model include:
[0008] A wet dust collector for treating flue gas in the thermochemical modification of rice husks, comprising a flow equalizer, an air outlet and a water tank; the flow equalizer is arranged with its opening downward inside the air outlet and the two are coaxial, an air inlet is provided at the bottom of the air outlet, the air inlet is connected to the opening of the flow equalizer, and the air inlet is used to receive the flue gas generated during the thermochemical modification of rice husks.
[0009] The air outlet tube has an outer wall and an inner wall, a first chamber is formed between the outer wall and the inner wall, an air outlet is provided at the top of the first chamber, a second chamber is formed between the inner wall and the equalizer tube, a rotatable water tank is arranged above the second chamber, a plurality of first air vents are evenly provided on the equalizer tube for connecting the interior of the equalizer tube and the second chamber, and a plurality of second air vents are evenly provided on the inner wall for connecting the first chamber and the second chamber.
[0010] The bottom of the water tank is provided with a plurality of concentric and relatively independent annular grooves, and a plurality of gaps are provided at intervals at the bottom of the annular grooves. The gaps connect the interior of the water tank and the second chamber, and a drain outlet is provided at the bottom of the air vent below the second chamber.
[0011] A further technical solution is that the top of the flow-uniform cylinder has a bearing mounting position, a bearing is sleeved at the bearing mounting position, and the water tank is an annular water tank, the central hole wall of which is connected to the outer surface of the outer ring of the bearing.
[0012] A further technical solution is that a plurality of support beams are provided at the upper opening of the annular water tank along the radial direction thereof, and the plurality of support beams are distributed in a circular pattern along the center of the annular water tank.
[0013] A further technical solution is that an upper end cover is provided on the top of the punching bag, a driving motor is provided on the upper surface of the upper end cover, the output end of the driving motor is connected to a gear, and the gear is meshed and connected to the annular rack fixed above the multiple support beams.
[0014] A further technical solution is that the air outlet is connected to a negative pressure fan through a pipeline and a filter is provided between the air outlet and the negative pressure fan.
[0015] A further technical solution is that the drain outlet is connected to a water pump via a pipe, and the water pump outlet is connected to an opening above the water tank via a pipe.
[0016] A further technical solution is that the annular groove includes a first side wall and a second side wall, both of the first side wall and the second side wall have an inclination angle and the bottoms of the two are connected by a connecting strip to form a V-shaped annular groove with an opening upward, and a plurality of the notches are provided on the connecting strip.
[0017] A further technical solution is that the plurality of notches are distributed along the central circumference of the annular groove, and the notches are fan-shaped or circular.
[0018] A further technical solution is that the total area of the notches is 1 / 3 to 1 / 2 of the total area of the connecting strips.
[0019] (3) Beneficial effects
[0020] The beneficial effects of the utility model are:
[0021] In the wet dust collector provided by the present invention, air vents are distributed and arranged on the inner wall of the air outlet tube and the equalizing tube. This hole-like structure can achieve a good equalizing effect. After the smoke from the smoldering rice husk enters the equalizing tube, it is evenly dispersed by the above-mentioned air vents. After passing through the second chamber, it enters the first chamber through the air vents. A rotatable water tank is provided above the second chamber, and a plurality of annular grooves are provided at the bottom of the water tank. The water flowing down in the annular grooves can form a plurality of groups of strip-shaped water curtains. With the rotation of the water tank, the plurality of groups of strip-shaped water curtains can form a plurality of annular water curtains. The annular water curtains react better with the smoke in the second chamber to remove harmful impurities therein. The above structure of the present invention enables the discharged smoke to meet environmental emission standards and has environmental protection significance. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 The overall structure diagram of the wet dust collector used to treat flue gas in the thermochemical modification of rice husks;
[0023] Figure 2 for Figure 1 The main cross-sectional view of
[0024] Figure 3 Schematic diagram of the specific structure of the flow uniformity tube;
[0025] Figure 4 Schematic diagram of the specific structure of the water tank;
[0026] Figure 5 for Figure 4 Enlarged schematic diagram of point A in the middle.
[0027] [Description of Reference Numerals]
[0028] 1: flow equalizer; 11: bearing installation position;
[0029] 2: Exhaust pipe; 21: Air inlet; 22: Outer wall; 23: Inner wall; 24: First chamber; 25: Air outlet; 26: Second chamber; 27: Drain outlet; 28: Upper end cover;
[0030] 3: Water tank; 31: Annular groove; 32: Support beam; 33: Water inlet; 311: First side wall; 312: Second side wall; 313: Connecting strip; 313-1: Notch;
[0031] 41: first vent hole; 42: second vent hole;
[0032] 5: drive motor;
[0033] 6: Ring rack;
[0034] 7: Negative pressure fan;
[0035] 8: filter;
[0036] 9: Water pump. DETAILED DESCRIPTION
[0037] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation methods in conjunction with the accompanying drawings.
[0038] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0039] In addition, the terms "first," "second," and so on, used in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.
[0040] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.
[0041] This embodiment provides a wet dust collector for treating flue gas in the thermochemical modification of rice husks. Figure 1 and Figure 2 As shown, it includes a flow equalizer 1, an air outlet 2 and a water tank 3; the flow equalizer 1 is opened downward and is arranged inside the air outlet 2 and the two are coaxial, and an air inlet 21 is opened at the bottom of the air outlet 2, and the air inlet 21 is connected to the opening of the flow equalizer 1, and the air inlet 21 is used to receive the flue gas generated during the thermochemical modification of rice husks.
[0042] The air outlet tube 2 has an outer wall 22 and an inner wall 23, and a first chamber 24 is formed between the outer wall 22 and the inner wall 23. An air outlet 25 is arranged at the top of the first chamber 24, and a second chamber 26 is formed between the inner wall 23 and the equalizer tube 1. A rotatable water tank 3 is arranged above the second chamber 26. A plurality of first air vents 41 connecting the interior of the equalizer tube 1 and the second chamber 26 are evenly provided on the equalizer tube 1, and a plurality of second air vents 42 connecting the first chamber 24 and the second chamber 26 are evenly provided on the inner wall 23.
[0043] The bottom of the water tank 3 is provided with a plurality of concentric and relatively independent annular grooves 31, and a plurality of notches 313-1 are spaced apart at the bottom of the annular groove 31. The notches 313-1 connect the interior of the water tank 3 and the second chamber 26. A drain outlet 27 is provided at the bottom of the air outlet 2 below the second chamber 5.
[0044] Specifically, a pipe extending into the interior is welded at the air inlet 21 at the bottom of the air outlet tube 2, and an external thread is set on the pipe. The opening section of the flow equalizer tube 1 is provided with an internal thread, and the opening of the flow equalizer tube 1 and the air inlet 21 are connected by the internal and external threads.
[0045] In this embodiment, vent holes 4 are distributed throughout the inner wall 23 of the outlet tube 2 and the flow-leveling tube 1. This porous structure effectively achieves a uniform flow. The smoke from the smoldering rice husk enters the flow-leveling tube 1 and is evenly dispersed by the vent holes 4. After passing through the second chamber 26, it enters the first chamber 24 through the vent holes 4, resulting in a smoother flow path for the smoke.
[0046] A plurality of annular grooves 31 are provided at the bottom of the rotatable water tank 3. The water flowing down in the annular grooves 31 can form a plurality of groups of strip-shaped water curtains. With the rotation of the water tank 3, the plurality of groups of strip-shaped water curtains can form a plurality of groups of annular water curtains. The annular water curtains can better react with the smoke in the second chamber 26.
[0047] In this embodiment, the top of the flow equalizer 1 has a bearing mounting position 11, and the bearing is sleeved at the bearing mounting position 11. The water tank 3 is an annular water tank, and the hole wall of its central hole is connected to the outer surface of the outer ring of the bearing.
[0048] Specifically, the flow-distributing tube 1 has an opening at one end and a solid shaft at the other. When in use, the opening of the flow-distributing tube 1 faces downward, thus forming a blockage above the flow-distributing tube 1. This not only blocks the smoke, but also better supports the water tank 3. The solid shaft also has a shoulder for better supporting the bearing, which is preferably capable of withstanding large axial loads.
[0049] In this embodiment, a plurality of support beams 32 are provided at the upper opening of the water tank 3 along the radial direction thereof. The plurality of support beams 32 are distributed in a circular pattern along the center of the water tank 3 , and a water inlet 33 is formed between adjacent support beams 32 .
[0050] Specifically, in this embodiment, there are eight support beams 32. The presence of support beams 32 can reduce axial deformation of the water tank 3 and prevent rotational obstruction of the water tank 3. The maximum outer contour of the water tank 3 is 1 mm away from the inner surface of the inner circle formed by the inner wall 23 of the exhaust pipe 2.
[0051] In this embodiment, an upper end cover 28 is provided on the top of the exhaust pipe 2, and a driving motor 5 is provided on the upper surface of the upper end cover 28. The output end of the driving motor 5 is connected to a gear, and the gear is meshed and connected to the annular rack 6 fixedly provided above the multiple support beams 32.
[0052] Specifically, the upper end cap 28 is welded to the punching bag 2 to ensure a good seal; threading, riveting, or other methods may also be used. In this embodiment, there are three drive motors 5, arranged at 120-degree angles. These three drive motors 5 are equipped with a synchronous control system to ensure stable drive. Bevel gears are used as the gears, and a bevel rack is used as the annular rack 6.
[0053] In this embodiment, the air outlet 25 is connected to the negative pressure fan 7 through a pipeline, and a filter 8 is provided between the air outlet 41 and the negative pressure fan 7 .
[0054] In this embodiment, the drain outlet 27 is connected to the water pump 9 through a pipe, and the outlet of the water pump 9 is connected to the water inlet 33 above the water tank 3 through a pipe.
[0055] It should be noted here that sodium hydroxide needs to be added to the water in the water tank. The pipe at the water inlet 33 is fixed to the upper surface of the upper end cover 28 through a clamp, and the water outlet of the pipe extends above the water inlet 33.
[0056] In this embodiment, each independent annular groove 31 includes a first sidewall 311 and a second sidewall 312. Both the first sidewall 311 and the second sidewall 312 have an inclination angle, and their bottoms are connected by a connecting strip 313 to form a V-shaped annular groove with an upward opening. The connecting strip has multiple notches 313-1 defined therein. The multiple notches 313-1 are distributed along the central circumference of the annular groove 31 and are fan-shaped or circular.
[0057] Specifically, the area of the notch 313-1 is 1 / 3 to 1 / 2 of the area of the connecting strip 313. This is done to control the amount of water flowing down. The amount of smoke that can be processed is calculated based on the amount of water flowing down, and the sizes of the first and second vent holes 41, 42 are then calculated based on the amount of smoke.
[0058] Specifically, the number of independent annular grooves 31 in this embodiment is 5, and the gap 313-1 is fan-shaped. When the water tank 3 located above the second chamber 26 rotates, the water flow passing through the gap 313-1 forms 5 annular water curtains. The flue gas passes through the 5 water curtains from the center to reach the first chamber 24, which can more fully react with impurities in the flue gas and reduce the pollution of the exhaust gas.
[0059] The specific working process of the wet dust collector provided in this embodiment for treating flue gas in the thermochemical modification of rice husks is as follows:
[0060] The smoke generated by the smoldering rice husks is collected and piped to the air inlet 21, where it then enters the equalizer tube 1. Because the upper portion of the equalizer tube 1 is blocked, the smoke enters the second chamber 26 through the first vent 41 on the equalizer tube 1. Simultaneously, the drive motor 5 drives the gears, which in turn rotate the annular rack 6, which in turn rotates the water tank 3. The water in the water tank 3, guided by the annular groove 31, flows down along the notch 313-1 at the bottom of the annular groove 31, forming a cylindrical water curtain. Specifically, this is five interlocking cylindrical water curtains. After the water in these cylindrical water curtains reaches the bottom of the exhaust tube 2, it is driven by the water pump 9 through the drain port 27 and reaches the water inlet 33 at the top of the water tank 3. In the second chamber 26, the smoke passes through the five cylindrical water curtains in sequence, where the smoke and water undergo a sufficient reaction. After the treated smoke reaches the exhaust tube 2, it enters the first chamber 24 through the second vent 42 on its inner wall 23. Under the action of the negative pressure fan 7, the gas in the first chamber 24 is drawn to the filter 8 through the gas outlet 25. The filter 8 will further filter the particulate matter in the gas and then discharge it into the air through the pipeline.
[0061] It should be understood that the above description of the specific embodiments of the present invention is merely for the purpose of illustrating the technical approach and features of the present invention. Its purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. However, the present invention is not limited to the above-described specific embodiments. Any changes or modifications made within the scope of the claims of the present invention shall be included within the scope of protection of the present invention.
Claims
1. A wet dust collector for treating flue gas in the thermochemical modification of rice husks, characterized in that: It comprises a flow-distributing cylinder (1), an air outlet cylinder (2) and a water tank (3); The flow-leveling cylinder (1) is opened downward and is arranged inside the gas outlet cylinder (2) and the two are coaxial. An air inlet (21) is provided at the bottom of the gas outlet cylinder (2). The air inlet (21) is connected to the opening of the flow-leveling cylinder (1). The air inlet (21) is used to receive the flue gas generated during the thermochemical modification of rice husks. The air outlet cylinder (2) has an outer wall (22) and an inner wall (23), a first chamber (24) is formed between the outer wall (22) and the inner wall (23), an air outlet (25) is provided at the top of the first chamber (24), a second chamber (26) is formed between the inner wall (23) and the equalizing cylinder (1), a rotatable water tank (3) is provided above the second chamber (26), a plurality of first vent holes (41) communicating with the interior of the equalizing cylinder (1) and the second chamber (26) are uniformly provided on the equalizing cylinder (1), and a plurality of second vent holes (42) communicating with the first chamber (24) and the second chamber (26) are uniformly provided on the inner wall (23); The bottom of the water tank (3) is provided with a plurality of concentric and relatively independent annular grooves (31), the bottom of the annular groove (31) is provided with a plurality of gaps (313-1) at intervals, the gaps (313-1) communicating with the interior of the water tank (3) and the second chamber (26), and a drain outlet (27) is provided at the bottom of the gas outlet (2) below the second chamber (26).
2. The wet dust collector for treating flue gas in the thermochemical modification of rice husks according to claim 1, characterized in that: The top of the flow-distributing cylinder (1) is provided with a bearing mounting position (11), a bearing being sleeved at the bearing mounting position (11), and the water tank (3) is an annular water tank, the wall of the central hole of which is connected to the outer surface of the outer ring of the bearing.
3. The wet dust collector for treating flue gas in the thermochemical modification of rice husks according to claim 2, characterized in that: Along the radial direction of the water tank (3), a plurality of support beams (32) are provided at the upper opening thereof. The plurality of support beams (32) are distributed in a circular pattern along the center of the water tank (3), and a water inlet (33) is formed between adjacent support beams (32).
4. The wet dust collector for treating flue gas in the thermochemical modification of rice husks according to claim 3, characterized in that: An upper end cover (28) is provided on the top of the exhaust pipe (2), and a driving motor (5) is provided on the upper surface of the upper end cover (28). The output end of the driving motor (5) is connected to a gear, and the gear is meshed and connected to an annular rack (6) fixedly provided above the plurality of support beams (32).
5. The wet dust collector for treating flue gas in the thermochemical modification of rice husks according to claim 1, characterized in that: The air outlet (25) is connected to a negative pressure fan (7) via a pipeline, and a filter (8) is provided between the air outlet (25) and the negative pressure fan (7).
6. The wet dust collector for treating flue gas in the thermochemical modification of rice husks according to claim 1, characterized in that: The drain port (27) is connected to a water pump (9) via a pipeline, and the outlet of the water pump (9) is connected to a water inlet (33) above the water tank (3) via a pipeline.
7. The wet dust collector for treating flue gas in the thermochemical modification of rice husks according to claim 1, characterized in that: Each independent annular groove (31) comprises a first side wall (311) and a second side wall (312), wherein the first side wall (311) and the second side wall (312) both have an inclination angle and the bottoms of the two are connected by a connecting strip (313) to form a V-shaped annular groove with an opening facing upward, and a plurality of notches (313-1) are provided on the connecting strip.
8. The wet dust collector for treating flue gas in the thermochemical modification of rice husks according to claim 7, characterized in that: A plurality of the notches (313-1) are distributed along the central circumference of the annular groove (31), and the notches (313-1) are fan-shaped or circular.
9. The wet dust collector for treating flue gas in the thermochemical modification of rice husks according to claim 8, characterized in that: The total area of the notch (313-1) is 1 / 3 to 1 / 2 of the total area of the connecting strip (313).